3D-Printed D.I.Y. Linear Servo Big Owl

3D-printed linear servo with amazing stroke length of about 165 mm achieved by a bendable but still sturdy band of metal completely D.I.Y.

Roger Rabbit

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Description

The new linear servo approach uses a flexible metal band which when bent into shape gets sturdy and still can be rolled up on a drum (cylinder)
I am using only standard parts and electronics such as the ATTiny and a DC gear-motor. (the schematics can be found in the pictures)
STL-Files will be published soon!
A motion study can be found here: https://www.youtube.com/watch?v=2p7mIsCNFCA
and here: https://www.youtube.com/watch?v=T9Sq1TAgjSc

3D-printed parts where ordered on Itead Studio www.itead.cc

Details

- Gear Motor: Precision Microdrives Model 201-109 (30 rpm)

Discussions

Simon Merrett wrote 11/30/2016 at 08:56

Also, have a look at this system which uses a similar principle to make poles for antennae and tripods http://www.rolatube-expeditionary-systems.com/

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Simon Merrett wrote 11/30/2016 at 02:55

This is a great concept. It inspired me to make a version with two strips of metal to strengthen against buckling. It uses hook and loop (velcro) to keep the bands connected when they're extended and each strip stores on its own drum, connected by a gear on each drum to maintain alignment. My prototype needs a curved enclosure to ensure that the metal strip extends rather than opening the winding wider. Will send a picture if I can.

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